Genetic (co) variance across age of fiber diameter and standard deviation in Huacaya alpacas, estimated by repeatability, multi-trait and random regression models

dc.contributor.authorCruz, Alan
dc.contributor.authorMenéndez-Buxadera, Alberto
dc.contributor.authorGutiérrez, Gustavo
dc.contributor.authorMorante, Renzo
dc.contributor.authorBurgos, Alonso
dc.contributor.authorPablo Gutiérrez, Juan
dc.date.accessioned2021-11-11T20:05:58Z
dc.date.available2021-11-11T20:05:58Z
dc.date.issued2020
dc.descriptionUniversidad Nacional Agraria La Molina. Escuela de Posgrado. Maestría en Producción Animal
dc.description.abstractA total of 14,378 records of fiber diameter (FD) and its standard deviation (SD) from Huacaya alpaca recorded between 2001 and 2017 at Pacomarca genetic center were used in this study. These records were analyzed by a repeatability (RM), multitrait (MT) and random regression (RRM) models. The heritability (h2) estimates were 0.263 and 0.368 for FD and SD respectively under a RM model; these ranged from 0.653 to 0.742 for FD and 0.627 to 0.764 for SD under MT and from 0.561 to 0.614 for FD and 0.556 to 0.702 for SD under RRM. The MT and RRM show a pattern of increase in variances and heritability as age increases for SD and till 6 years of age for FD, while the genetic correlation (rg) decrease for both traits between 1 and 5 years of ages. The breeding value for the three models show a linear relationship for FD and SD across age at shearing, meaning that any of these models can be used in the selection process. The results of this study shows that during this period of time a highly favorable selection response was obtained for fiber quality in Huacaya alpaca using RM, however the use of the RRM approach can offer more valuable information, particularly in the persistence of the genetic merit of the animals at 5 years respect to 1 years old at shearing. More research is needed on the use and relationship between persistence and others economical traits in alpaca.
dc.formatapplication/pdf
dc.identifier.citationCruz, A.; Menéndez-Buxadera, A.; Gutiérrez, G. ; Morante, R.; Burgos, A., Pablo Gutiérrez, J.P. ( 2020). Genetic (co)variance across age of fiber diameter and standard deviation in Huacaya alpacas, estimated by repeatability, multi-trait and random regression models, Livestock Science, Volume 231, 2020, 103863, ISSN 1871-1413, https://doi.org/10.1016/j.livsci.2019.103863. (https://www.sciencedirect.com/science/article/pii/S1871141319312119)
dc.identifier.urihttps://hdl.handle.net/20.500.12996/5034
dc.language.isoeng
dc.publisherElsevier
dc.publisher.countryUS
dc.rightsinfo:eu-repo/semantics/restrictedAccess
dc.sourcehttps://www.sciencedirect.com/science/article/abs/pii/S1871141319312119
dc.subjectAlpaca
dc.subjectFibras de origen animal
dc.subjectLana
dc.subjectDiámetro
dc.subjectDimensión
dc.subjectCalidad de la fibra
dc.subjectProducción de lana
dc.subjectPeso corporal
dc.subjectExplotaciones agrarias
dc.subjectProducción animal
dc.subjectEvaluación
dc.subjectPerú
dc.subjectFibra de alpaca
dc.subject.ocdehttps://purl.org/pe-repo/ocde/ford#4.02.01
dc.titleGenetic (co) variance across age of fiber diameter and standard deviation in Huacaya alpacas, estimated by repeatability, multi-trait and random regression models
dc.typeinfo:eu-repo/semantics/article
dc.type.versioninfo:eu-repo/semantics/publishedVersion

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